US3215214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus
Assignee: Individual
•
Filing: 1962-08-06
•
Granted: 1965-11-02
•
Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Michael R Caro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:15
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/34; E21B7/00; E21B7/04; E21B7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
DRILLING APPARATUS OF THE CHARACTER DESCRIBED COMPRISING, IN COMBINATION, A SHAFT ADAPTED FOR POWERED ROTATION, A TUBULAR HOUSING ROTATABLY MOUNTED CONCENTRICALLY ON SAID SHAFT, PLANETARY GEAR MEANS CONNECTING SAID SHAFT TO SAID HOUSING FOR OPPOSED ROTATION THEREOF RELATIVE TO SAID SHAFT, A PLURALITY OF ROTARY CUTTING TOOLS ROTATABLY MOUNTED ON SAID HOUSING FOR ROTATION THEREWITH, GEAR MEANS CONNECTING SAID SHAFT TO SAID TOOLS FOR ROTATION THEREOF RELATIVE TO SAID HOUSING, AND SAID TOOLS BEING OF INCREASINGLY GREATER RADIAL DFISTANCE FROM SAID SHAFT WHILE ROTATING ABOUT AXES NORMAL TO THE SHAFT.
Claim 2
Dependent Claim
90 words
DRILLING APPARATUS OF THE CHARACTER DESCRIBED COMPRISING, IN COMBINATION, A SHAFT ADAPTED FOR POWERED ROTATION, A TUBULAR HOUSING ROTATABLY MOUNTED CONCENTRICALLY ON SAID SHAFT, PLANETARY GEAR MEANS CONNECTING SAID SHAFT TO SAID HOUSING FOR OPPOSED ROTATION THEREOF RELATIVE TO SAID SHAFT, A PLURALITY OF ROTARY CUTTING TOOLS ROTATABLY MOUNTED ON SAID HOUSING FOR ROTATION THEREWITH, GEAR MEANS CONNECTING SAID SHAFT TO SAID TOOLS FOR ROTATION THEREOF RELATIVE TO SAID HOUSING, AND SAID TOOLS BEING OF INCREASINGLY GREATER RADIAL DFISTANCE FROM SAID SHAFT WHILE ROTATING ABOUT AXES NORMAL TO THE SHAFT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |